A melodrama epic about the great deal of trouble Choi Kang Chi, born as a half-human-half-mythical-creature, who goes through in order to become human and a story of Choi Kang Chi’s journey of struggling in order to live more like a human than anyone else despite not being able to become human.

Choi Kang Chi (Lee Seung Ki) was raised by the Choi family after having been picked up from the river. Choi Kang Chi is the son of Goo Wol Ryung (Choi Jin Hyuk), the guardian spirit of Jiri Mountain, and Yoon Seo Hwa (Lee Yeon Hee), his human mother. Kang Chi is an outspoken character who’s full of curiosity. He realizes that he’s a half-human-half-beast through a certain incident and starts living his second life.

Dam Yeo Wool (Bae Suzy) is a master of martial arts and archery. Yeo Wool is an upright character who really values the Three Bonds and Five Relationships in Confucianism, and becomes an instructor at a martial arts center at a young age.